For the most part, from what what I have experienced. I have had zero issues with the scripts I have used, but I have heard of others who have problems when they get into very specific functions, especially those that use extensions. Mysql support is longer built directly into php 5. I had no problem setting up mysql support for php 5 in fedora core 4, however windows proved to be a challenge and I still don't remember how I did it because I can't do it again. If you use mysql and you do not have a good reason to upgrade to php 5, I do not recommend the upgrade. For many windows servers, I did not see it as a necessity because my php 4 simply wasn't broke. Therefore I did not fix it. -Aaron k Sent via BlackBerry from T-Mobile -----Original Message----- From: "Mike harrell" <triple_h@xxxxxxxxxxxxx> Date: Mon, 1 Jan 2007 20:56:05 To:php-windows@xxxxxxxxxxxxx Subject: php5 Is php5 backwards compatable with php4 scripts ? -- PHP Windows Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php